I love my A6 but now , big problems . I will list them in the order they happend
1. son broke oil pan and right front cv boot, I repaird the pan with liguid weld and put it back up, the pan was clean of forighn particals.started the engine and all was fine except for a slight leak I took the pan back down ,re-welded it this time the oil sensor could not be saved. started it up ,engine fine with check engine light . next day started it up cooling fans dont work and engine skips with abs and ecm lights on.

I have the same car, about 91K. I just had to have the front CV Boots changed too. Have you had it in to change the timing belt and water pump, tensioners, serp belt, etc? Its suggested at 91 or 92K in the manual.

I have not been on-line lately because I am changing everything , I just came in from removing the intake manifold

i got the same car and my engine is skipping w/ ecm light on too, ecm light eventually went out but engine still sputtering somewhat. problem came out of no where